4020425421 has 8 divisors (see below), whose sum is σ = 5675894784. Its totient is φ = 2522619840.

The previous prime is 4020425417. The next prime is 4020425459. The reversal of 4020425421 is 1245240204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4020425421 - 2² = 4020425417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4020425391 and 4020425400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020425401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39415885 + ... + 39415986.

It is an arithmetic number, because the mean of its divisors is an integer number (709486848).

Almost surely, 2^4020425421 is an apocalyptic number.

It is an amenable number.

4020425421 is a deficient number, since it is larger than the sum of its proper divisors (1655469363).

4020425421 is a wasteful number, since it uses less digits than its factorization.

4020425421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78831891.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 4020425421 is about 63406.8247194259. The cubic root of 4020425421 is about 1590.0984105064.

Adding to 4020425421 its reverse (1245240204), we get a palindrome (5265665625).

The spelling of 4020425421 in words is "four billion, twenty million, four hundred twenty-five thousand, four hundred twenty-one".